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| Hauptseite > Workflowsammlungen > In Bearbeitung > Optimization of a 900 MHz Elliptical Dipole Antenna for a GPR Monitoring System |
| Hauptseite > Workflowsammlungen > In Bearbeitung > Optimization of a 900 MHz Elliptical Dipole Antenna for a GPR Monitoring System |
| Book/Report | FZJ-2026-02225 |
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2026
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
Jülich
Report No.: 4450
Abstract: The antenna is a critical component determining the performance of a Ground-Penetrating Radar (GPR) system, directly impacting its signal-to-noise ratio (SNR), resolution, and survey depth. A custom GPR currently in development at Institute of Technology and Engineering (ITE) at Forschungszentrum Jülich GmbH requires antennas with optimal performance in the frequency range of 450 MHz to 1350 MHz, linear phase characteristics and uniform radiation for an angle of approximately 90 degrees. This paper presents the analysis and optimization of a custom planar elliptical dipole. The existing shrinked antenna design was evaluated. Scattering parameter measurements were performed alongside simulations to validate the accuracy of the numerical model and determine the feasibility of optimization. Using the CST Studio Suite simulation environment, various geometrical parameters were analyzed to determine their impact on the reflection coefficient and radiation patterns. Sensitivity analysis indicated that changing the size constraints was necessary for better efficiency. Within the redefined but still compact constraints, optimization was performed to maximize the operating bandwidth. The resulting optimized design maintains a reflection coefficient better than –10 dB in the 900-1350 MHz range. Due to physical size limitations, the reflection coefficient gradually degrades below 900 MHz, yielding >-5 dB at 450 MHz.
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